Al-Oruba International School s
Dept.: Science High school (Physics)
Grade: 12
Title: Practice sheet Ch. 9 Sec. 3
Q1: Choose the correct answer:
1. Specific heat is
a. the specific temperature at which the substance is in solid state.
b. the energy needed to increase the temperature of 1 kg of a substance by 1
degree Celsius.
c. the amount of heat conducted in 1 minute.
d. the heat needed to increase the temperature of 1 gallon of water by 1
degree Fahrenheit.
2. When a solid, liquid, or a gas change from one physical state to another, the change is called
a. melting
b. enthalpy
c. a phase change
d. sublimation
3. The amount of thermal energy needed to raise the temperature of 1 kg of materials by 1
degree Celsius is called the ____.
a. thermal pollution
b. conduction
c. convection
d. specific heat
4. Which of the following is true during a phase change?
a. Temperature increases.
b. Temperature remains constant.
c. Temperature decreases.
d. There is no transfer of energy as heat.
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5. What is the energy transferred per unit mass during a phase change called?
a. latent heat
b. specific heat capacity
c. internal energy
d. thermal energy
6.
a.
b.
c.
d.
As a liquid undergoes a phase change to a gas state, it
releases heat while remaining at a constant temperature.
absorbs heat while remaining at a constant temperature.
releases heat as the temperature decreases.
absorbs heat as the temperature increases.
7. At what point on the figure above is the amount of energy transferred as heat approximately
10.5 × 103 J?
a. A
b. B
c. C
d. D
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8. The figure above shows how the temperature of 10.0 g of ice changes as energy is added. At what
point on the figure above does the substance undergo a phase change?
a. A
b. C
c. D
d. E
9. The graph shows the change in temperature of a material as it is heated. Which part on the
graph shows when the material is boiling?
a.
b.
c.
d.
A
B
C
D
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10. The figure above shows how the temperature of 18.0 g of ice changes as energy is added. Which
of the following statements is correct?
a. The water absorbed energy continuously, but the temperature increased only when all of the
water was in one phase.
b. The water absorbed energy sporadically, and the temperature increased only when all of the
water was in one phase.
c. The water absorbed energy continuously, and the temperature increased continuously.
d. The water did not absorb energy.
11. What three properties of a substance affect the amount of energy transferred as heat to or from
the substance?
a. latent heat, temperature change, specific heat capacity
b. latent heat, temperature change, specific heat capacity
c. mass, temperature change, specific heat capacity
d. mass, temperature change, latent heat
12. A calorimeter is used to determine the specific heat capacity of a test metal. If the specific heat
capacity of water is known, what quantities must be measured?
a. metal volume, water volume, initial and final temperatures of metal and water
b. metal mass, water mass, initial and final temperatures of metal and water
c. metal mass, water mass, final temperature of metal and water
d. metal mass, water mass, heat added to or removed from water and metal
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13. Which property of a substance is not needed to determine the amount of energy transferred as
heat to or from the substance?
a. temperature change
b. specific heat capacity
c. volume
d. mass
14. Substance C has a higher specific heat than substance D. With all other factors equal, which
requires the most energy to heat equal masses of C and D to the same temperature?
a. Substance C.
b. Substance D.
c. Both require the same amount of heat.
d. Answer depends on the density of each substance.
15. With all other factors equal, the most likely to burn your mouth when taken directly from an
oven is a food with
a. higher specific heat capacity.
b. lower specific heat capacity.
c. specific heat is not important in this situation.
d. more information needed.
16. A slice of bread contains about 6.19 × 105 J of energy. If the specific heat capacity of a person is
6.19 × 103 J/kg•°C, by how many degrees Celsius would the temperature of a 90.0 kg person
increase if all the energy in the bread were converted to heat?
a. 9.25°C
b. 1.11°C
c. 3.86°C
d. 8.00°C
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17. What state(s) of matter are present at D-E?
a.
b.
c.
d.
Solid-liquid
Liquid
Liquid-gas
Gas-Solid
18. Between which points is the temperature of the substance remaining constant?
a.
b.
c.
d.
A-B only.
A-B, C-D, E-F
B-C only.
B-C, D-E.
19. Between which points is the temperature of the substance increasing?
a.
b.
c.
d.
A-B only.
A-B, C-D, E-F
B-C only.
B-C, D-E
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20. What line segment represents heat of fusion?
a. A-B
b. B-C
c. C-D
d. D-E
21. In which segment is the kinetic energy remaining constant?
a.
b.
c.
d.
A-B
B-C
C-D
E-F
22. What line segment represents only the solid state?
a. A-B
b. B-C
c. C-D
d. D-E
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